From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julia Lawall Date: Tue, 20 May 2014 00:36:24 +0000 Subject: Re: [PATCH 1/13] libertas: make return of 0 explicit Message-Id: List-Id: References: <1400473875-22228-1-git-send-email-Julia.Lawall@lip6.fr> <1400473875-22228-2-git-send-email-Julia.Lawall@lip6.fr> <5379FCD0.2030506@cogentembedded.com> In-Reply-To: <5379FCD0.2030506@cogentembedded.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Sergei Shtylyov Cc: "John W. Linville" , kernel-janitors@vger.kernel.org, libertas-dev@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org On Mon, 19 May 2014, Sergei Shtylyov wrote: > Hello. > > On 19-05-2014 8:31, Julia Lawall wrote: > > > From: Julia Lawall > > > Delete unnecessary local variable whose value is always 0 and that hides > > the fact that the result is always 0. > > > A simplified version of the semantic patch that fixes this problem is as > > follows: (http://coccinelle.lip6.fr/) > > > // > > @r exists@ > > local idexpression ret; > > expression e; > > position p; > > @@ > > > > -ret = 0; > > ... when != ret = e > > return > > - ret > > + 0 > > ; > > // > > > Signed-off-by: Julia Lawall > > > --- > > Alternatively, was an error code intended in the bad length case, as is > > done in process_brxed_802_11_packet? > > > drivers/net/wireless/libertas/rx.c | 7 ++----- > > 1 file changed, 2 insertions(+), 5 deletions(-) > > > diff --git a/drivers/net/wireless/libertas/rx.c > > b/drivers/net/wireless/libertas/rx.c > > index c7366b0..807c5b8 100644 > > --- a/drivers/net/wireless/libertas/rx.c > > +++ b/drivers/net/wireless/libertas/rx.c > [...] > > @@ -154,10 +152,9 @@ int lbs_process_rxed_packet(struct lbs_private *priv, > > struct sk_buff *skb) > > else > > netif_rx_ni(skb); > > > > - ret = 0; > > done: > > - lbs_deb_leave_args(LBS_DEB_RX, "ret %d", ret); > > - return ret; > > + lbs_deb_leave_args(LBS_DEB_RX, "ret %d", 0); > > Why not just "ret 0"? Oops, I won't make any change here, because Dan Williams has proposed another patch that makes the ret variable useful. julia